Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K1SU callsign genealogy
Currently held by Maseizik, Frederick
The FCC publishes a previous_call_sign on
every amateur license — a self-link to the licensee's prior callsign.
Following those links produces the chain below.
Previous callsigns
Older callsigns held by K1SU's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held K1SU.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K1SU, oldest first.
- Maseizik, Frederick CT2007-06-25 → cancelled 2019-09-19
- Gaudet, Scott M MA2019-10-08 active